217f4788e1
In this commit, we add --concurrency, the stage D knob. It lets the sender run several of its own payments at once, racing itself for its own outbound liquidity. Every tier this program has run sent one payment at a time, so the only contention a router has ever seen came from its own shards or from other people's payments. Like every stamped section before it, the flag makes no rng draw, so a corpus generated without it is byte identical to one generated before it existed: seven paired generator trees at a fixed seed, across the default, hard, drift, split, split-atomic and drift-atomic modes, all diff identical. A bare number is the common case. The long form pins the arrival spacing, and that is the knob a tier designer has to think about: a window that empties before it fills tests nothing, so inter_arrival_sec wants to be at or below the time a payment takes on the tier, and mean_concurrent in the output is what says which happened. The flag help says where the tier comes from, because the section alone is not enough. Without a clock the payments cannot overlap at all and the simulator refuses the section outright; without atomic_mpp a shard settles the instant it arrives and reserves nothing, so nothing contends. The concurrency tier is therefore generated alongside --drift and --atomic. poisson is rejected here by the same name the simulator rejects it by. An arrival rate interacts with the background traffic prorating carry, and that carry is the one piece of the simulator whose draw order every sealed tier depends on. |
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| .claude/commands | ||
| .gemini | ||
| .github | ||
| .sessions | ||
| .vscode | ||
| actor | ||
| aezeed | ||
| aliasmgr | ||
| amp | ||
| autopilot | ||
| batch | ||
| blockcache | ||
| bolt12 | ||
| brontide | ||
| buffer | ||
| build | ||
| cert | ||
| chainio | ||
| chainntnfs | ||
| chainparams | ||
| chainreg | ||
| chanacceptor | ||
| chanbackup | ||
| chanfitness | ||
| channeldb | ||
| channelnotifier | ||
| chanstate | ||
| clock | ||
| cluster | ||
| cmd | ||
| contractcourt | ||
| contrib | ||
| discovery | ||
| docker | ||
| docs | ||
| feature | ||
| fn | ||
| funding | ||
| graph | ||
| healthcheck | ||
| htlcswitch | ||
| input | ||
| internal/musig2v040 | ||
| invoices | ||
| itest | ||
| keychain | ||
| kvdb | ||
| labels | ||
| lncfg | ||
| lnencrypt | ||
| lnmock | ||
| lnpeer | ||
| lnrpc | ||
| lntest | ||
| lntypes | ||
| lnutils | ||
| lnwallet | ||
| lnwire | ||
| macaroons | ||
| make | ||
| mobile | ||
| monitoring | ||
| msgmux | ||
| multimutex | ||
| nat | ||
| netann | ||
| onionmessage | ||
| payments/db | ||
| peer | ||
| peernotifier | ||
| pool | ||
| protofsm | ||
| queue | ||
| record | ||
| routing | ||
| rpcperms | ||
| scripts | ||
| shachain | ||
| signal | ||
| simulation | ||
| sqldb | ||
| subscribe | ||
| sweep | ||
| ticker | ||
| tlv | ||
| tools | ||
| tor | ||
| walletunlocker | ||
| watchtower | ||
| zpay32 | ||
| .editorconfig | ||
| .gitignore | ||
| .golangci.yml | ||
| .protolint.yaml | ||
| accessman.go | ||
| accessman_test.go | ||
| channel_notifier.go | ||
| chanrestore.go | ||
| CLAUDE.md | ||
| config.go | ||
| config_builder.go | ||
| config_onion_ratelimit_test.go | ||
| config_prod.go | ||
| config_test.go | ||
| config_test_native_sql.go | ||
| dev.Dockerfile | ||
| doc.go | ||
| Dockerfile | ||
| go.mod | ||
| go.sum | ||
| intercepted_forward.go | ||
| LICENSE | ||
| lnd.go | ||
| log.go | ||
| logo.png | ||
| Makefile | ||
| pilot.go | ||
| README.md | ||
| routesim | ||
| rpcserver.go | ||
| rpcserver_test.go | ||
| sample-lnd.conf | ||
| SECURITY.md | ||
| server.go | ||
| server_test.go | ||
| sqlc.yaml | ||
| subrpcserver_config.go | ||
| sweeper_wallet.go | ||
| tls_manager.go | ||
| tls_manager_test.go | ||
| types.go | ||
| witness_beacon.go | ||
| witness_beacon_test.go | ||
Lightning Network Daemon
The Lightning Network Daemon (lnd) - is a complete implementation of a
Lightning Network node. lnd has several pluggable back-end
chain services including btcd (a
full-node), bitcoind, and
neutrino (a new experimental light client). The project's codebase uses the
btcsuite set of Bitcoin libraries, and also
exports a large set of isolated re-usable Lightning Network related libraries
within it. In the current state lnd is capable of:
- Creating channels.
- Closing channels.
- Completely managing all channel states (including the exceptional ones!).
- Maintaining a fully authenticated+validated channel graph.
- Performing path finding within the network, passively forwarding incoming payments.
- Sending outgoing onion-encrypted payments through the network.
- Updating advertised fee schedules.
- Automatic channel management (
autopilot).
Lightning Network Specification Compliance
lnd fully conforms to the Lightning Network specification
(BOLTs). BOLT stands for:
Basis of Lightning Technology. The specifications are currently being drafted
by several groups of implementers based around the world including the
developers of lnd. The set of specification documents as well as our
implementation of the specification are still a work-in-progress. With that
said, the current status of lnd's BOLT compliance is:
- BOLT 1: Base Protocol
- BOLT 2: Peer Protocol for Channel Management
- BOLT 3: Bitcoin Transaction and Script Formats
- BOLT 4: Onion Routing Protocol
- BOLT 5: Recommendations for On-chain Transaction Handling
- BOLT 7: P2P Node and Channel Discovery
- BOLT 8: Encrypted and Authenticated Transport
- BOLT 9: Assigned Feature Flags
- BOLT 10: DNS Bootstrap and Assisted Node Location
- BOLT 11: Invoice Protocol for Lightning Payments
Developer Resources
The daemon has been designed to be as developer friendly as possible in order
to facilitate application development on top of lnd. Two primary RPC
interfaces are exported: an HTTP REST API, and a gRPC
service. The exported APIs are not yet stable, so be warned: they may change
drastically in the near future.
An automatically generated set of documentation for the RPC APIs can be found at api.lightning.community. A set of developer resources including guides, articles, example applications and community resources can be found at: docs.lightning.engineering.
Finally, we also have an active
Slack where protocol developers, application developers, testers and users gather to
discuss various aspects of lnd and also Lightning in general.
First-time contributors are highly encouraged to start with code review first, before creating their own Pull Requests.
Installation
In order to build from source, please see the installation instructions.
Docker
To run lnd from Docker, please see the main Docker instructions
IRC
- irc.libera.chat
- channel #lnd
- webchat
Safety
When operating a mainnet lnd node, please refer to our operational safety
guidelines. It is important to note that lnd is still
beta software and that ignoring these operational guidelines can lead to
loss of funds.
Security
The developers of lnd take security very seriously. The disclosure of
security vulnerabilities helps us secure the health of lnd, privacy of our
users, and also the health of the Lightning Network as a whole. If you find
any issues regarding security or privacy, please disclose the information
responsibly by sending an email to security at lightning dot engineering,
preferably encrypted using our designated PGP key
(91FE464CD75101DA6B6BAB60555C6465E5BCB3AF) which can be found
here.